How can I check the size of my key or certificate?
Some web servers will display this information in the properties of your key or certificate. Or, you can connect to a secure page on your server using Internet Explorer (Netscape does not display this information). Internet Explorer: File | Properties > click on 'Certificate' for more details.
If you have OpenSSL, you can check, using the following command:
openssl x509 -noout -text -in